A250531 Number of (n+1)X(3+1) 0..3 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction

3958, 44017, 393910, 3091263, 21783369, 142934266, 885728348, 5269466799, 30337133947, 170444570767, 938858272263, 5094247207831, 27305253854913, 144985807285630, 763985644924271, 4002062352221853, 20864575519057800

Offset

1,1

Comments

Column 3 of A250536

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical recurrence of order 65

Formula

Empirical recurrence of order 65 (see link above)

Example

Some solutions for n=2
..1..1..2..3....0..0..1..3....0..3..1..3....0..1..1..2....0..0..2..2
..3..2..2..3....1..1..1..3....3..1..3..3....0..1..1..3....1..1..2..2
..0..3..3..3....3..3..3..1....0..3..3..3....0..2..1..3....0..2..1..2

Crossrefs

Sequence in context: A059666 A230707 A230617 * A319800 A373391 A034599

Adjacent sequences: A250528 A250529 A250530 * A250532 A250533 A250534

Keyword

nonn

Author

R. H. Hardin, Nov 24 2014

Status

approved